Add 18/21 and 90/24
1st number: 18/21, 2nd number: 3 18/24
18/21 + 90/24 is 129/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 24 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
18/21 = 18 × 8/21 × 8 = 144/168 - Likewise, for the 2nd fraction, since 24 × 7 = 168,
90/24 = 90 × 7/24 × 7 = 630/168 - Add the two like fractions:
144/168 + 630/168 = 144 + 630/168 = 774/168 - 774/168 simplified gives 129/28
- So, 18/21 + 90/24 = 129/28
In mixed form: 417/28
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